Radio receiving structure



y 1933- A. E. TAUSCHER 2,123,027

RADIO RECEIVING STRUCTURE Filed 001;. 6, 1937 37 25 3- Emil 4.

II g J 1/ 1/4" 1/ 5 5 1 I 1672,? {Ki 2 1 ,j' 1 I \m 1 Patented July 5, 1938 PATENT OFFICE RADIO RECEIVING STRUCTURE Arno E. Tauscher, Chicago, Ill.

Application October 6,

4 Claims.

The invention has for its object to provide a radio receiving or sound transmitting structure which will transmit to the ear of the listener the sounds transmitted from the broadcasting station to the receiving structure as the same are delivered to the microphone of the broadcasting station, without change in register or quality Without necessitating any tone quality or register adjusments of the receiving structure.

A further object of the invention is to provide a receiving and sound transmitting structure presenting the advantages hereinabove pointed out which is relatively small, compact and cheap and may be embodied in furnishing units of a home.

A suitable and exemplary embodiment of the invention is illustrated in the accompanying drawing, wherein:

Fig. l is a central vertical sectional view, partly in elevation, illustrating a radio receiving structure constructed in accordance with the in- Vention.

Fig. 2 is a bottom plan view of the set of resonance or sounding boards included in the set shown in Fig. 1.

Fig. 3 is a View in elevation of a receiving set of the invention embodied in a lamp.

The structure of this invention comprises a bowl I, preferably composed of sheet metal, but which may be made of other materials possessing characteristics necessary to produce the same or substantially the same result as the metallic bowl shown, said bowl constituting a container and support for an inner metallic member 2. The latter is of truncated cone shape and it also is preferably composed of sheet metal and is equipped at its upper end with an outwardly projecting flange 3 which rests upon and. is suitably secured to the similar flange 4 of the bowl I, and which is also equipped at its lower end with an outwardly projecting annular flange 5, the circumferential flange of said member 2 being equipped at regular intervals with outwardly projecting beads 6 which act to stiifen the same to reduce its tendency to vibrate.

Secured to the flange 5 is a dished skeleton sheet-metal member 1 which may be deemed to constitute a foraminous bottom wall of the member 2 and to which the conventional electrically responsive mechanism common to all radio receiving sets is secured for support, said mechanism being indicated by reference numerals 8 and 9. The electric wiring, (not shown) which connects elements 8 and 9 with the condenser and tubes of any conventional radio receiving 1937, Serial N0. 167,520

set, passes through a central opening H3 in the bottom of the bowl I, the device of the present invention being in the nature of an attachment to a conventional type of receiving set, the casing of which houses the condenser and tubes and carries the control devices common to receiving sets.

The member 2 and all parts carried thereby are spaced from the walls of the bowl I the latter having a slightly tapered circumferential wall and a dished bottom wall which is flat at its lowermost middle portion H and is flared upwardly to meet said circumferential wall as shown at E2.

The resonance or sounding boards l3, I i, l5, and I6, composed of suitable wood or other material possessing the same or equivalent characteristics, are coupled with each other in spaced apart and parallel relation to each other by means of sheet metal brackets H, the uppermost board 13 being of slightly larger diameter than i the board M and the latter being of slightly larger diameter than the board IS, the lowermost board I6 being of much smaller diameter than the board l5. All of said boards are preferably circular and are concentric with each other, the peripheral edges of all the same being spaced from and disposed concentric with the circumferential wall of the member 2. The board [6 lies below the flange 5 of the member 2 and is spaced from the member 1.

The diaphragm [8 of the type common to and commonly termed the horn or loud-speaker of a radio receiving set, is supported peripherally upon the peripheral edge portion of the said member 1 and is clamped between the latter and the flange 5 of the member 2, the coupling elements such as the bolts l9 being passed through the said peripheral portion of said diaphragm.

The tube and condenser containing case 20 of a conventional receiving set is shown in Fig. 3 and is equipped with the manually operable control buttons 2| and 22, the said elements 8 and 9 and the diaphragm l8 being transferred from said casing 20 to the structure which includes the bowl I, member 2 and the several parts connected with the latter.

The said bowl I may be disposed for support upon the top wall of the casing 20 or may project partly into the same and, preferably, when embodied in a lamp support, said bowl I is housed by a casing 23 which, in turn, supports the standard or stem 24 of the lamp. The top wall of the casing 23 is preferably foraminous, but is not specifically illustrated to show this as such illustration is deemed to be superfluous.

In actual use the structure of this invention effects a very appreciable improvement in tone and register of sounds transmitted to and through it from the diaphragm I8, the tones being far more round and smooth and devoid of the harshness that is quite common to radio receiving sets. It is believed that the several boards I3-l6 of different dimensions are responsive respectively in different degree to tones from deep base to high treble and by their combined vibrations responsively to the vibrations of the diaphragm 18 correct inaccurate sound transmissions of the latter with respect to predominance of tones in base register as opposed to middle or treble register and vice-versa and causing all tones in the several registers to be transmitted to the ear of the listener in their true respective values.

The members I and 2 are vibrated responsively to vibrations of the diaphragm l8 in different degree than the boards or disks l3 to 16 inclusive and vary the tone quality resulting from the combined action of the diaphragm l8 and said boards l3 to IE inclusive, the latter being secured to and suspended from the flange 3 of the member I by means of the brackets 25.

Practice has demonstrated that the ribs 6 of the member 2 have a decided influence upon the tone quality of the structure, in that, if omitted, said tone-quality is affected adversely, but it is impossible for the applicant to determine why.

Similarly, the shape of the bowl I appears to affect the tone quality, the shape thereof as illustrated herein being selected as the result of many experiments, as best suited and adapted to produce the desired result when composed of sheet metal.

I claim as my invention:

1. A structure of the type specified comprising a bowl, a sounding board containing and supporting member mounted within the upper portion of said bowl and supported upon the top of the latter, said member presenting a peripheral wall spaced from the surrounding wall of said bowl, conventional electrically responsive sound transmitting means, including the conventional diaphragm constituting a part thereof, mounted upon the lower end of the peripheral wall of said member and contained within the bottom portion of said bowl, and a plurality of spaced apart parallel sounding boards mounted within the last named member and having their peripheral edges spaced from the surrounding wall thereof and all of said boards spaced from and opposed to said diaphragm.

2. A structure of the type specified comprising a bowl, a sounding board containing and supporting member mounted within the upper portion of said bowl and supported upon the top of the latter, said member including a peripheral tapered wall spaced from the surrounding wall of said bowl, conventional electrically responsive sound transmitting means, including the conventional diaphragm constituting a part thereof, mounted upon the lower end of said peripheral wall of said member and contained within the bottom portion of said bowl, and a plurality of spaced apart parallel sounding boards mounted within the last-named member and having their peripheral edges spaced from the surrounding wall thereof and all of said boards being substantially concentric with and opposed to and spaced from said diaphragm.

3. A structure of the type specified comprising a bowl, a sounding board containing and supporting member mounted within the upper por-- tion of said bowl and supported upon the top of the latter, said member including a tapered peripheral wall spaced from the surrounding wall of said bowl, conventional electrically responsive sound transmitting means including the conventional diaphragm constituting a part thereof, mounted upon the lower end of said member and contained within the bottom portion of said bowl and a plurality of sounding boards of respectively different diameters disposed in spaced apart and parallel relation to each other and substantially concentric with each other and said diaphragm and spaced from and opposed to the latter, said sounding boards mounted in and carried by said member and having their peripheral edges spaced from the surrounding wall thereof.

4. A structure of the type specified comprising a bowl, a sounding board containing and supporting member mounted within the upper portion of said bowl and supported upon the top of the latter, said member including a tapered and longitudinally ribbed peripheral wall spaced from the surrounding wall of said bowl, conventional electrically responsive sound transmitting means, including the conventional diaphragm constituting a part thereof, mounted upon the lower end of said peripheral wall of said member and contained within the bottom portion of said bowl, and a plurality of sounding boards of respectively different diameters disposed in spaced apart and parallel relation to each other and substantially concentric with each other and said diaphragm and said member and spaced from and opposed to said diaphragm mounted in and carried by said member and having their peripheral edges spaced from the surrounding wall thereof, the smallest diameter sounding board of the group being disposed nearest said diaphragm and the largest diameter board being disposed farthest from said diaphragm and at the mouth of said member.

ARNO E. TAUSCI-IER. 

